I've always wondered about the space itself what is that when I hear about the big bang it was kinda speculative coz Newtown sated every action has every reaction so what action reacted to big bang and reversed and that same goes to energy conservation which sates energy neither can be created nor destroyed so how can a point blast and create everything was there somthing before it but what i wonder is what could be the reason behind the existence of universe itself

Starlink is contributing a lot these days...

About 40% of disused satellites burning up in Earth's atmosphere these days belong to SpaceX's Starlink megaconstellation, according to Andrew Bacon, the chief technology officer and co-founder of U.K.-based in-orbit manufacturing firm Space Forge.

These satellites are mostly made of aluminum, which turns into aluminum oxide when burned at high temperatures, such as those experienced by satellites hurtling through Earth's atmosphere at orbital speeds. This aluminum ash accumulating at high altitudes worries scientists because of its potential to damage Earth's protective ozone layer and alter its albedo — the ability to reflect sunlight — which could result in changes in the temperature of the upper atmosphere.